Pencil



Patented Aug. i9, 1924.

CHARLES n. wann, .on ananinnii, AND HENRY W. Lenssen, on AKLAND, CALI- ronnie.` t f l maar PENCIL. t f

Application ledAprl 21, 1920. `Serial No. 375,646.

To all whom t may come/m:

Be it known that we, CHAnLns E. VVEHN and HENRY W. LARssoN, citizens of the United States, residing at Alameda and Oakland, respectively, in the county of yAtlameda and State of California, have invented 'a new and useful Improvement in Pencils, of which the following is a specification.

This invention relates to a pencil and especially to improvements on the structure shown in Patent No. 1,302,999, issued May 12, 1919, entitled Pencih and in a pending application entitled Pencil, lfiled February 8, 1920, Serial No. 357,390.

One of the objects of the present invention is to provide a pencilof the feed or mechanical type which is simple and substantial in construction, cheap to manufacture, easy to manipulate, and so arranged that the lead may bereadily advanced when j worn or changed and replaced whenever desired.

Anotherobject of the invention is to provide a novel form of screw'feed mechanism for advancing the lead as they point becomes worn, and in conjunction Vtherewith means for securing one of the screw feed members against rotation, said means also serving as a connector and reinforcing kmember for opposite sections of the pencil as will hereinafter bedescribed.

Further objects will hereinafter appear. The invention consists 4of the partsand theV construction, combination and arrange- Vment of parts as hereinafter more 'fully described and claimed, having reference to the accompanying drawings, in which- Fig. 1 is a central vertical longitudinal section of the pencil, the member 7 ybeing shown in full and a part thereof broken away. l 4' Fig. 2 is a cross section on line 2 2,y Fig. 1

Fig. 3 is a detail view of the pencil cap. Fig. Fig. 3. n

Fig. 5 is a perspective view of the keyway member. i

Fig. 6 is a perspectiveview of thescrew bar and the plunger whereby `the lead is fed in a forward direction.

Fig. 7 is a perspective view showing the screw feed mechanism assembled.

4 is a cross section on line klL-4,

Referring to the drawings in detail, A indicatesinfgeneral a mechanical ytype of pencil, which in this instance consists of two sections 2 and 3. Secured in the forward section 2v of the pencil is a lead receiving holder t, and formedrearwardly thereofis a passage 5, through which the lead feeding plunger or' rod 6 extends. 'Connecting *sections 2 and 3 is a holder 7. f This holder is provided with a key-way 8 extending from end to end, in which is slidably mounted a bar 9. Thisjbar has threads 10 formed on its upper edge which are engaged by a nut 11 turnablymounted on the'holder 7. This holder is circular in crossvsection, as shown in Figs. 2 and r5, and thereby forms a bearing for the nut 11. As the bar 9 is adapted toA slidevin the keyway groove 8 of the combined holder and connecting bar `7, as will' be later explained, each of the barrel sections 2 and?) is provided with a keyway or` f groove a, both of which keyways or grooves a align' withthe keyway or groove 8 in the connecting member 7.

j' @For the purpose of forming a rigid connectionbetween the pencil sections 2 and 3,

wey provide a pair of ferrules or "collars 12 `and 13. These are ysecured on the central holder f by r pinning, soldering or otherwise, and they are recessed as at 14 to receive the pencil sections 2 and 3 as shown, said pencil sectionsf2 and 3 being shown in Fig. f1 secured by pins 21 but may be cemented, pinned or otherwise secured therein, and similarly lsecured tothe holderf?. The uppersection3 of the pencil is recessed as at 15 for the reception of the holder 7 and also to permit movement of the bar 9. This bar carries the 'pin or plunger Gand may travel either in a forward or rearward` direction by turning the nut 11 as desired. Formed'in the upper end of the section 3 is a lead receiving' chamber 16, and forming a closure therefor is a cap 17. This cap is hollow yas shown and itis provided with a 'sleeve'extension 18,r which is split as at 19 when applied in the chamber 1.0.

In actualoperation if it is desired to insert a lead, it isl only necessary to remove the cap 17 and one of the leads contained therein. The cap is then replaced and the lead is insertedin the holder 4 by forcing it into a passage la formed within the same',

' the bar 9 and the plunger 6 having been re- 'secured thereto.

tracted by turning movement of the nut l1. Once the lead is inserted, it is lpossible to feed it forwardly at any time by merely turning, the nut. This nut is freely turnable upon the rholder 7 and between the collarsor ferrulesLZ and 13, and as it engages thel threaded portion of the bar 9, it can readily be seen that this will travel in a forward direction and consequently force the. leadr in an outward direction through the holderv 4;, due to engagement of th plunger 6 therewith.

A simple substantial mechanism has 1n this/manner been provided which is readily manipulated whether the lead is to be fed forward as worn, or whether it is desired to entirely remove the same to change the lead. Y

The present invention contains several important features, first of all a pencil consisting of-two sections 2 and 3, said sections being rigidly tied and braced with relation to each other by the holdery 7, and further ,by the ferrules or collar members 12 andv 13 Second, the holder forms a part of the screw feed mechanism asit is secured against turning` movement and serves asa guide and receiver for the bar 9, having a threaded portion l0 formed thereon. Third, an exceedingly simple mechanism, cheap to manufacture and readilyfassembled has been provided. Fourth, a fool and tamper-proof mechanism is alsoy provided as access to the mechanism can not be obtained once the pencil is assembled. and completed. f

While any suitable `form of cap may be employed as a closure for the lead receiving chamber, we prefer the form here shownI as it'forms a snap lock which prevents accidentalremoval of the same. 7e similarly wish it understood thatvarious changes in design andconstruction may be resorted to within 'the s copeof the appendedclaims; also that tions, a member disposed withinboth of saidV barrel sections and having a longitudinal key-way formed therein, pms connecting the sections tovsaid member, a nut of less length than eltherof the vbarrel sections and'turnably mounted on said member and being unconnected with the barrel sections and separating the inner ends of the latter, a hollow lead receiving holder connected to the outer end of one of the barrel sections and means carried in the key-way Aof said connecting member' and actuated by said nut for advancing a lead through said holder.

2. ln ay device of the character described, a pair of longitudinally spaced barrel sections, a member disposedwithin both of said barrel sections and having a longitudinal key-way formed therein, a collar permanently fitted on the inner end of each section to reinforce the same, a nut of less length than the barrel sections and turnably mounted on said member between said collars and being unconnected with the barrel sections and collars, a hollow lead receiving holderhaving` a reduced end iitted in the outer end of one of the barrel sections and means connected in the key-way of said connecting member and actuated by said nut for advancing a lead through said holder.

3. In a device of the chajacter described, a pair of relatively long barrel sections, a member disposed within both of said barrel sections and having a longitudinal key-way formedV through one wall thereof andfopening through the ends of the member, thefkeyvway including. three closed sides, a collar fitted on the inner end of each section, devices connecting said collars andsaidisections and said member together, a nut of less: length than either ofthe barrel sections 'turnably mounted on'said vmember between said; collars ofthe barrel sectionsto separate the inner ends of the latter andlbeing unconnected with the collars, and barrel sections, a hollow lead receiving holderlitted: in the outerv end of one of the barrel sections, and a device slidabley along the three closed walls of the key-way and actuated by said nut. for

advancing a, lead through said holder.

e. A pencil comprising a pair of longitudinally interspaced barrel sections, a centrally disposed lholder within the barrel lsections and connecting the same, a lreyway formed in said holder, a toothed bar slidable in said lreyway,the teeth ofwhich project beyond the surface of. thea, holder,Y aligningl keywa-ys formedin the barrel sections to form a clearance for the teeth, a nut turnably mounted on the same between thebarrel sections and separating the same longitudinally, saidnut enga gin-gthe teeth of the bar only, a lead receivingholder in one of the barrel sections, and means on the bar adapted to engagefa lead-in saidholder.

5. A pencil comprising a pair off longitudinal-ly interspaced barrehsections, acentrally disposed holder within the barrelfsections and connecting the same, a pair of interposed ferrules -secured'to the. holder:l and to the respective barrel sections, av lreyway formed in said holder, a toothed bar slidable isc in said keyway, the teeth of which project beyond the surface of the holder, aligning lreyways formed in the barrel sections and in the ferrules respectively to form a clearance for the teeth, a nut turnably mounted on the holder between the barrel sections and separting the same longitudinally, said nut engaging the teeth of the bar only, a lead receiving holder in one of the barrel sections, and means on the bar adapted to engage a lead in said holder. 6. A pencil comprising a pair of longitudinally interspaced barrel sections, a cen trally disposed holder within the barrel sections and connecting the same, a pair of interposedy ferrules, one oneach end of the holder, said ferrules being secured to the holder and to the respective barrel sections, a keyway formed in said holder, a toothed bar slidable in said keyway, the teeth *of which project beyond the surface` of the holder, aligning keyways formed in the ferrule sections to form a clearance for the teeth, a nut turnably mounted on the holder between the barrel sections and separating the same longitudinally, said nut engaging the teeth of the bar only, a lead receiving holder in one of the barrel sections, and

means on the bar adapted yto engage a lead in said holder.

7 A. pencil, comprising hollow barrel sections havingalining key-ways, a memberar ,n ranged interiorly of thesections, a lead re` ceiving passage,y in the outer end of one of the feed member extending into said alining keyways of the sections, and a nut embracing the connecting member and filling the space between the inner ends of thebarrel sections and adapted to engage the threads of the flat t portion of the feed member so that upon rotation of the nut in one direction the feed member may slide so as to cause the rod portion of the feed member to advance the lead in the lead receiving passage.

In testimony whereof we have hereunto set our hands in the presence of two subscribing witnesses.

CHARLES E. WEHN. HENRY W. LARSSON. WITNESSES:

W. W. HEALEY, M. E. EwiNa v 

